Quote Originally Posted by gortnipper View Post
Now I just have to listen to them against some Alnico 604s?.

David
The won't play as low or as high...but might have more magic in the middle. Maybe we should buy all Duelund filters from Rick for Christmas? Probably not with my ever shrinking job!

As for the box, I made it up. This was the ~4 cubic foot sealed box I developed when I was trying to arrive at something compact that would not require a stand and raked the baffle back at about ~10 degrees so that it could be very short. The thing with the sealed box was that it didn?t have enough low end so I made the 10.5 cubic foot MLTL in the meantime, then finally cut a hole in the bottom of these to give better bass. (This is my 6th box variant)

I simulated it in Jeff Bagby?s spreadsheet using the 10.5 cubic foot MLTL as the first simulation to verify how well the software worked, then settled on 40hz in room as an F6 target knowing that room gain down low especially would make it mostly flat.

Here are the internal dimensions:

Those are vented out the bottom with a 4" x 3/4" hole. The woofer center is roughly 9? down from the top.

17"w x 34.75"h

top plate is 8.75" deep

bottom plate is 13.75? deep

Total volume is ~110.5 liters.

Best,

Chris